Ȥ
Z with hook, Ȥ is a letter of the Latin script.
The Unicode standard notes "Middle High German" for the application of the grapheme, intended to represent the coronal fricative also transcribed as tailed z. The -character is used in modern printings of Medieval German literature to indicate those cases of pronounced as . In contrast, the -character is pronounced as, as is still the case in modern German. And the -character is pronounced as.